/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.netbeans.modules.xml.retriever;

import java.net.URI;
import org.openide.filesystems.FileObject;

/**
 * The XMLCatalogProvider allows a {@link org.netbeans.api.project.Project} to
 * convey information about the XML catalog file usage within the project.
 * @see org.netbeans.api.project.Project#getLookup
 * @author Chris Webster
 * @author Girish
 */
public interface XMLCatalogProvider {
    /**
     * This constant identifies source roots which can be used to store
     * retrieved XML artifacts.
     */
    public static final String TYPE_RETRIEVED = "retrieved"; //NOI18N
    
    /**
     * Provide the project root relative reference to the catalog file
     * for the specified XML artifact.
     * @param targetFile represents the XML artifact which may require use of
     * a catalog for resolution. The common case, a single project wide catalog
     * file, would delegate to #getProjectWideCatalog().
     * @return a URI representing the relative path from the project root to the
     * catalog file (i.e. ./catalog.xml which is the default)
     */
    URI getCatalog(FileObject targetFile);
    
    /**
     * Provide the project root relative reference to the catalog file
     * @return a URI representing the relative path from the project root to the
     * catalog file (i.e. ./catalog.xml which is the default)
     */
    URI getProjectWideCatalog();
    
}
